Chem. J. Chinese Universities ›› 2021, Vol. 42 ›› Issue (12): 3731.doi: 10.7503/cjcu20210469

• Physical Chemistry • Previous Articles     Next Articles

Preparation of CoCrx/SAPO-34 Catalyst and Its Catalytic Combustion Performance for 1,2-Dichloroethane

WU Shuaini, ZHU Pengfei, SHI Huaiqi, LI Na, HU Zhaoxia(), CHEN Shouwen   

  1. School of Biological and Environmental Engineering,Nanjing University of Science & Technology,Nanjing 210094,China
  • Received:2021-07-05 Online:2021-12-10 Published:2021-09-16
  • Contact: HU Zhaoxia E-mail:huzhaoxia@njust.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(51708295);the Fundamental Research Funds for the Central Universities, China(30920021114)

Abstract:

Catalytic combustion is one of the most efficient and economical methods for the treatment of chlorinated volatile organic compounds(CVOCs). For the exploration of high-efficient catalyst, SAPO-34 type molecular sieve was synthesized by hydrothermal method using triethylamine and tetraethylammonium hydroxide as composite templates, and subsequently used as support to prepare a series of CoCrx/SAPO-34 catalysts (x=0.05—0.25) by rotary steam impregnation method. Structure and surface acidity of these catalysts were investigated, and their catalytic combustion performance was evaluated with 1,2-dichloroethane(1,2-DCE) as the target pollutant. The results showed that the CoCr0.06/SAPO-34 catalyst with the loading of 20%(mass fraction) Co3O4 and the Cr doping ratio of 0.06 exhibited excellent catalytic activity for 1,2-DCE(T90=290 ℃). At 290 ℃, the catalytic conversion of 1,2-DCE over CoCr0.06/SAPO-34 can be maintained beyond 80% for 45 h, showing excellent stability and resistance to chlorine poisoning.

Key words: Catalytic combustion, SAPO-34, Surface acidity, 1, 2-Dichloroethane, Cobalt chromium oxide

CLC Number: 

TrendMD: